New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/46010#discussion_r1322335132

Comment:
I think the only non-portable part is missing a semicolon `;` after `q`. All other parts are portable.

Can you try: `			sed -n '/^committer /{s/.*> \([0-9][0-9]*\) [-+][0-9].*/\1/p;q;}'`?
If it doesn't work, I would prefer this, instead:
```diff
diff --git a/common/environment/setup/git.sh b/common/environment/setup/git.sh
index bd72f2eae3..b9a5c692b8 100644
--- a/common/environment/setup/git.sh
+++ b/common/environment/setup/git.sh
@@ -18,7 +18,7 @@ elif [ -z "${SOURCE_DATE_EPOCH}" ]; then
 		export SOURCE_DATE_EPOCH="$(stat -c %Y ${XBPS_SRCPKGDIR}/${basepkg}/template)"
 	else
 		export SOURCE_DATE_EPOCH=$($XBPS_GIT_CMD -C ${XBPS_DISTDIR} cat-file commit HEAD |
-			sed -n '/^committer /{s/.*> \([0-9][0-9]*\) [-+][0-9].*/\1/p;q}')
+			awk '/^commiter .* [-+][0-9]*$/{ print $(NF - 1); exit; }')
 	fi
 fi
 
```